Pistonxbihg removed



J. BRETZ, JR.

PISTON RING REMOVER.

APPLICATION man JULY I, ma.

1,303,458. Patented May 13, 1919.

. IIIHIHHHHIZ INVENTOR oknijvefg G;

BY ATTORNEY UNITED STATES PATENT OFFICE.

JOHN BBETZ, JR", 015 DETROIT, MICHIGAN.

PISTON-RING neiuovnn.

and State of Michigan, have invented cer-- tain new and useful Improvements in Piston-Ring Removers, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to tools for removing packing rings from pistons and its object is to provide a very simple and efficient device for the purpose which is inexpensive to manufacture and 1s so constructed as to 3 prevent injury to a ring in removing it and will expand and hold the ring without liability of accidental disengagement therefrom.

With these and other ends in view, the invention consists in the matters hereinafter set forth and more particularly pointed out in the appended claims, reference being had to the accompanying drawing in which Figure 1 is a perspective view of tool illustrative of the invention and showing the same as applied to a ring in use;

Fig. 2 is an edge elevation of the tool;

Fig. 3, an enlarged end elevation showing the same engaged with a piston ring; and

Fig. 4, is a perspective detail showing a slightly modified construction for use in re moving rings of the type to which the device is shown as applied in the figure.

As shown in the drawings, the tool comprises {two thin flat metal strips 1 each curved or bent laterally intermediate its ends so that said middle portions may be overlapped and pivotally united by a bolt 2 passing through openings in the two strips. Each bar or strip 1 is curved or bent laterally toward the other strip at each end so that when the bars are turned on their pivotal connection the adjacent endsof the bars at one end will be brought together and the opposite ends of the bars will be spread apart, the laterally curved portions 3 of the bars between their ends and their pivotal connection, facilitating the pivotal movement by serving as a portion to be grasped in the hand of the operator.

The end portions 4 of the bars are twisted, bringing the planes of their side faces at right angles to the correspondlng faces of the body portion so that these end portions may be brought together, face to face, and each end portion of each bar 1s provldecl Specification of Letters Patnt.

meshing of theend face with one edge forming the acute angle or. point5. In order that the .notchesfi and 7 inthe opposed ends of thebars may conform closely to the shape of that portion of angular ends 01 thering to be engaged thereby, the notch 6 is formed withia beveled upper side 8 anda straight lower side and the notch 7 is formed ina similar manner with the beveled edge 9 at the lower side thereof. The beveled ends of the ring thus seat firmly upon the sides of the notches with their sharp angular points 5 projecting through the notches, and thus said ends are firmly engaged by the tool, preventing accidental disengagement or a tendency of the ring to tilt when the ends 'are spread apart by the tool. In otherwords the angular ends of the ring wedge into these notches, and the greater the resistance offered by the ring to spreading, the more firmly it will be held by the tool.

Preferably, one end of the tool is formed with notches, as shown, to engage a ring the ends of which are beveled in one direction, and the opposite end with notches arranged to engage a ring, the ends of which are beveled in an opposite direction, so that by simply turning the tool, end for end, it may be used first upon one ring and then upon the other,or the tool may be formed at one end to engage one kind of ring and at the opposite end to engage another kind, and as shown at 10 in'Fig. 4, the ends being split longitudinally to form overlapping tongues 11.

As shown in Fig. 4:, when the tool is made for removing lap-joint rings 10, the ends 12 of the bars 1 are turned outwardly without being twisted as shown in the other figures, and these ends are notched at one side to form shoulders. 13 adapted to engage the shoulders 14: on the ring, and projections or tongues 15 to engage the outer face of the rlng.

Obviously, the ends of the tool may be formed in various ways to properly engage andhold rings of different constructions and I do not therefore limit myself to the particular construction shown.

What I claim is 1. A piston ring expander comprising two i Patented May 13, 1919. Application filed July 1, 19ie.qseria11r.e42.761. r

fiat metal strips, bent laterally. intermediate of their ends with said intermediate portionsoverlapped, the end .portionsof said strips at both ends thereofbeing; twisted to bring thew idefaces, of saidend po ti nsw n o planes at] right angles to, the "planes of the side faces of the 'intermediate portionsj'of he strips, and both.end-:,p,ortions .of;

stripbeing formed with notches in theirends to receive and holdvthe ends of a piston ring, and a vpivot connecting said strips at their overlapped portions. f

3. A piston ring expander comprising two fiat metal strips overlapped and pivotally connected anteri-nediate of their ends, the

portions of said strips between their pivotal connection and both ends of each strip being curved laterally in opposite directions to be grasped in the hand and both end portions Copies 01. this patent may be obtained 191' flve oents each, by addressing the "Commissioner of Patents, Washington, D. 0. 

